SCIENTIFIC ABSTRACT -

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001342710007-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: August 1, 2000
• Sequence Number: 7
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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SPECTPA or PRarolis AND r- NEBORS AT 9FA
LEVEZ_ r- L Petz;)oy iW If. V, ShoaWn"Ich (_L~txdev

lost. of P 641-4
106

; Russian)
(1964) Feb. 1.
o Protoa and r--mem momentum rpectra at sea level was
measured with an Allkhatiyaa-Alikhamv mapetle RMCtrom-
at- A rasCmalo field of 7500 puma was created by an
alactwmaper with polias 69 em I=g ard 20 cm wide and
witt 10 The experiment was carried out In
three vxrLaffoas, which Wered by it-- =mber and the
Watim of the cotatters In the series planed and the augneldc
poles. Re&Wts Gi tha sttalies esftblfzhed the fact that r--
meem numbar rednced sharply wLh the Increase af mn=z=-
Cum. An Inarmas fa particle number was observed, also. Ift
the momentum range war to I BeWo which can=t be ex-
plat as merely at "fUcal fluctuations. La determining
i ths particto mass of the almormat Ionization and momentum
it
decicled that Lkese
grciup
was
particles, obvtoazzly. are
heavy masons with the miss of -900 m.. It Is alga possible
that the graW ofZwj=LU obz-aryad in the range of 1 Bev/c
are heavy mesons. (R.VJ.)

am-
537.59 1. t
THE SPECTRA OF PROTOffj AW iC-MX9DN9 T
SEA~LEVft. ~L.L=V.Bhost%ovich.
Do Id. Akad. 1. 166, No. 4, 64 -4 (1956). In
Russian.
The authors employed an Alikhanyan-Alikhdnav mAgnatlc
jajoLomp, -ntB w1th three vurtations in
jar in,2king monsuromt
the numbara antl arrangemonta of the countern below Uir VoInq
of the magnet. Tfe re2dlngt taken over a pbriod of 2220 hours
give, for intervals in the range 0.5 to > 5 x 10 eV/c, the
era of p,~sitive and negative particles, the numbers of
protons, energies, and Intensities of the vertical proton
curent. The -curvil I the latter plotted against momentum La
practically Straight for momertimn I.. excess of 1.0 BqV/e
whilat far Smaller momertz the Slope tails off to raro, These
results correspond closely with those found by Mylroi and
Wilson (Abair. 5518/1961) who used a similar method,and an
expression Is given for this slope- The data for negative
particles were not sulficient to establish U~e form of the
ir -meson spectrum. Reselti; obtained by several workers at
a height of 3200 metras show Um came general form as those
.obtained at sea-level. C.R.S.Manders
r
I

POTAPOV, L.I.; SHOSTAKOVICH, N.V. [deceased]
~,;-
On proton andif -meson spectra at sea lev%t. Dokl,AN SSSR 106
no.4:641-644 7 156. (MLRA 9:6)
1.Fizichaskiy institut Imeni P.N.Lebedeva Akademli nank SSSR.
Predstayleno akademikom A.I.Alikhanovym.
(Protons--Spectra) (masons)

21(l) SOV/56-36-5-9/71
AUTHORS: Dayon, 1111. 1., Potarjov, L. I.
TITLE: The g-Meson Spectrum in Underground at a Depth Corresponding
to - 40 m of Water ( Spektr p mezonov pod zemley na I-lubine,
ekvivalentnoy , 40 m vody)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1959,
Vol 36, fir 3, pp 697-706 (USSSR)
ABSTRACT: The momentum spectra of g-mesons at sea level and on mountains
have already been investigated by a number of authors (Refs 1-6),
among others by Alikhanyan and Alikhanov. Under,--round, the
nucleon comuonent is rapidly absorbed and at a depth of B-10 r"
the penetrating component consists of muons. It was the air.
of the authors to investigate their spectrum in a depth of
40 m equivalent of water. The scheme of the experimental
arrangement is shomn by figure 1 and is described in short.
The data concerning the counters used are clearly given by
table 1. Among the total of 12 rows some hundreds of counters
were arranged. The radiotechnical part of the gyster.1 consisted
essentially of a coincidence block and a hodoscope of the
GKv7 type. The numerous measurin.- results are shown in tables
Card 1/3 and diagrams. Thus, table 2 gives the obtained (5-v;~lues at

Thep-Meson Spectrum in Undergrround at a Dr-,jt'i
H = 3300 and 6300 Oe, table 3 showo the values of the li-lit
power of the apparatus for n = 1~ 2, 3. The spectra constructed
in consideration of light power were produced on the basis
of the assumption that n = 2. In the momentum range
p ~~ 2.109 ev/c the muon spectrum may be approximated by the
formula 11(p)dn = N0dp/(p + p 0)7 , where 7 = 2,7L+0.2.' and
Po = 9.8 Bev/c (Fig 5). This formula can also be used for the
roughly approximated description of the spectrum in the ex-
8
tended range at p < 2.10 ev/c. The spectrum obtained permits
the conclusion that the so-called anomalous muon scatter-in,.-,
observed in a number of underground investigations can certain-
ly not be caused by an underestimation of the number of slow
muons. The authors finally thank A. 1. --'likhanyan for his
help, advice, and discussions, and V. Kh. Volynskiy and V.
Krugovykh for their assistance rendered in the course of
the experimental part of the work. They further thank S. 111'.
Vernov, it. L. Grigorov and G. B. Khristiansen for making it
possible to carry out vork at the podzemnaya laboratoriya
Card 2/3 Yoskovskogo gosudarstvennogo universiteta (Underground Laboratory

SO'-1/56-36-3-B/71
The V-Meson Spectrum in Underground at a Depth Correspondin:r t0-40 m of Water
of Moscow State University). There are a' fi:,-ures, 3 tables,
and 15 references, 6 of which are Soviet.
ASSOCIATION: Fizicheskiy institut im. P. 11. Lebedeva Akademii nauv. SSSR
(Physics Institute imeni P. 11T. Lebedev of the Academy of
Sciences, USSR)
SUBMITTED: July 30, 1958
Card 5/3

21(7) SO11/5 6- 76 -2 -4 7/71
AUTHORS: Dayon, M. I., Potapov, L, I.
TITLE: Measurement of Particle Masses of Cosmic Radiation Under
Ground (Izmereniye mass chastits kosmicheskogo izlucheniya
pod zemley)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 119519,
Vol 36, Nr 3, pp 921-922 (USSR)
ABSTRACT: In the present "Letter to the Editor" the authors publish
the results obtained by underground measurements of particle
masses; they used a magnetic spectrometer which at the same
time served for measuring the momentum spectrum and the
positive muon excess in a depth of -40 m water equivalent.
The scheme of the measuring device -gas already described
in an earlier paper (Ref 1). Under the device was a lead
block of 6 cm thickness, and under the telesccpe system there
was a system of lead filters which were separated from one
another by layers of hodoscope counters. As no precise
measurements were intended, relatively thick filters (4cm)
were chosen. The root mean square error in mass determination
is mentioned as.amounting to 30P 17, and 12% for the filters
Card 1 2 V, VI, VII respectively. The histogram determined from

SOV/5 6- 716 -3 -43/71
Measurement of Particle Masses of Cosmic Radiation Under Ground
370 trajectories is shown by figure 1. All recorded positive
and negative particles with 4 cm< R 416 cm were identified
asi4-(or n-mesons). The particle masses observed were between
100 and 400 me witzi a maximum at 200 meI in one single case
500 me was found. The authors finally thank A. I. Alikhanyan
for help, advice, and discussions, and V. Kh. Volynakiy and
V. V. Krugovykh for their great help in carrying out the
experimental part of the work, There are I figure and 3 Soviet
references.
ASSOCIATION: Fizicheskiy institut im. P. N. Lebedeva Akademii nauk SSSR
(Physics Institute imeni P. N. Lebedev of the Academy of
Sciences, USSR)
SUBMITTED: July 30, 1958
Card 2/2

Potapov, L. I.
14f 71-
J--T.
MaASUREtrENT OF THE MAS3 OF COLMIC RA--,Li-Me'
BEI-C'14' THE Sur-IFAIGE OF THE' E.'~Y-711
M. I. Daiyon, T.. 1. Potapnv
The magnetic spectrometer method was used to obtain a momentum spectrum
of --"'Lmesons at a depth of approximately-40 m. w.e. in the momentum range of
4.i08, 5.10 10 ev/s.
This spectrum is compared with the Caro spectrum and other spectra measurred
at sea level.
The mass value for 370 particles stopped in the filter (interval of ranges
4 cm Pb< R